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Trees Questions

Home > Technical Aptitude > Data Structures > Trees > General Questions
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Select the code snippet which performs post-order traversal.

pre-trav-4


AI

BII

CIII

DIV

Answer: Option B

Explanation:

Post order traversal follows NLR(Left-Right-Node).

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Why we need to a binary tree which is height balanced?


Ato avoid formation of skew trees

Bto save memory

Cto attain faster memory access

Dto simplify storing

Answer: Option A

Explanation:

In real world dealing with random values is often not possible, the probability that u are dealing with non random values(like sequential) leads to mostly skew trees, which leads to worst case. hence we make height balance by rotations.

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How many types of insertion are performed in a binary tree?


A1

B2

C3

D4

Answer: Option B

Explanation:

Two kinds of insertion operation is performed in a binary tree- inserting a leaf node and inserting an internal node.

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How will you find the maximum element in a binary search tree?


pre-trav-11


AI

BII

CIII

DIV

Answer: Option C

Explanation:

Since all the elements greater than a given node are towards the right, iterating through the tree to the rightmost leaf of the root will give the maximum element in a binary search tree.

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A treap is a combination of a tree and a heap.


ATRUE

BFALSE

Answer: Option B

Explanation:

A treap is a combination of a tree and a heap. The structure of a treap is determined by the fact that it is heap-ordered.

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Advantages of linked list representation of binary trees over arrays?


Adynamic size

Bease of insertion/deletion

Cease in randomly accessing a node

Dboth dynamic size and ease in insertion/deletion

Answer: Option D

Explanation:

It has both dynamic size and ease in insertion and deletion as advantages.

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Which special balanced binary search tree is used to store the nodes of auxiliary tree?


ARed – Black Tree

BRed – Brown Tree

CRed – Yellow Tree

DRed – Tango Tree

Answer: Option A

Explanation:

The path starting from the root and following the path of preferred child node till the end of leaf node is known as preferred path. Nodes are stored in Red – Black tree for the representation of the preferred path.

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After the insertion operation, is the resultant tree a splay tee?

splay-tree-1


ATRUE

BFALSE

Answer: Option A

Explanation:

There is a zig-zag and right operation(zig) which gives the right hand side tree. refer splay operations for insertion in splay tree.

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What is the maximum number of children that a binary tree node can have?


A1

B2

C3

Answer: Option B

Explanation:

In a binary tree, a node can have atmost 2 nodes (i.e.) 0,1 or 2 left and right child.

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Which of the following options is an application of splay trees?


Acache Implementation

Bnetworks

Csend values

Dreceive values

Answer: Option A

Explanation:

Splay trees can be used for faster access to recently accessed items and hence used for cache implementations.

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